No software, drivers or external power supply required. Compact aluminum case with built-in 6-inch USB cable fits easily into your pocket, backpack, briefcase or laptop bag, so you can read and write files at a moment's notice. Backward compatible with previous USB generations, so data can still transfer regardless of your device. The U352-000-MD-AL supports USB 3.0 transfer speeds up to 5 Gbps, which is 10 times faster than USB 2.0. If your tablet, laptop, Ultrabook, Chromebook or computer doesn't have a built-in memory card reader, but does have a USB port, the U352-000-MD-AL USB 3.0 SuperSpeed Multi-Drive Memory Card Reader/Writer can easily transfer data between your device and a wide variety of memory cards.